1. Cellular Respiration
Chapter 9

2. Cellular Respiration (Opposite of Photosynthesis)
Overall equation:
C6H12O6 + 6O2  6CO2 + 6H2O + energy
(glucose + oxygen) (carbon dioxide + water)
Releases energy by breaking down glucose
Occurs in all cells in all living things
(Plants go through cellular respiration at night)
In the presence of oxygen, cellular respiration produces a total of 36 ATP molecules per glucose.

3. 2 Types of Cellular Respiration
1. Aerobic respiration – does require oxygen
Occurs in the mitochondria
Produces more ATP (34)
2. Anaerobic respiration- does NOT require oxygen
-Occurs in the cytoplasm
-Produces less ATP (2)

4. Three Stages of Cellular Respiration
Glycolysis
(takes place in the cytoplasm)
2. Krebs Cycle
(takes place in the mitochondria)
3. Electron Transport Chain

5. Cellular Respiration

6. Glycolysis 1st stage Takes place in the cytoplasm Has a total of 2 ATP
(Produces 4 ATP but uses 2 ATP)
Anaerobic respiration (no oxygen)

7. Krebs Cycle (AKA: Citric Acid Cycle)
2nd stage
Takes place in mitochondria
Produces 2 ATP
Aerobic Respiration (requires oxygen)

8. Electron Transport Chain
3rd stage
Takes place in the mitochondria
Produces 32 ATP
Aerobic Respiration (requires oxygen)

9. Electron Transport Chain
Cellular Respiration
Occurs in cytoplasm
Occurs in mitochondria
Carbon dioxide +
Water
36 ATP
Krebs Cycle
2 ATP
Electron Transport Chain
32 ATP
Glycolysis
2 ATP
Glucose +
Oxygen =
anaerobic
aerobic

10. Anaerobic Respiration
Fermentation: releases ENERGY from FOOD by producing ATP in the ABSENCE of OXYGEN
Breaks down GLUCOSE (SUGAR)
Does NOT require oxygen
1. Alcoholic fermentation
Occurs in yeast cells
Produces 2 ATP, carbon dioxide and alcohol
Carbon dioxide causes bread to rise
2. Lactic Acid fermentation
Occurs in muscle cells
Produces 2 ATP, carbon dioxide and lactic acid
Lactic acid causes muscle soreness

11. 1. Alcoholic fermentation

12. 2. Lactic Acid fermentation

13. Cellular Respiration Review/Close
aerobic muscle anaerobic
Lactic Acid fermentation mitochondria 36
Alcoholic fermentation cellular respiration
1.________ is the process that releases energy by breaking down molecules in food.
*Cellular Respiration
2.When food is broken down in the presence of oxygen it is called _________.
*Aerobic
3. Aerobic respiration takes place in the ___________.
*Mitochondria
4. Overall, a total of ____ ATP molecules are produced during aerobic respiration.
*36
5. __________ respiration takes place in the absence of oxygen.
*Anaerobic
6. Two types of anaerobic respiration are __________, which takes place in yeast cells and _________ which takes place in muscle cells.
*Alcoholic fermentation
*Lactic Acid fermentation

14. Comparing Photosynthesis and Cellular Respiration
Function
Stores Energy
Energy release
Location
Chloroplast
Mitochondria
Reactants
Carbon dioxide and water
Glucose and oxygen
Products
Equation
6CO2+6H2O+light  6O2+C6H12O6
6O2+C6H12O6  6CO2+6H2O+energy

15. Plants
(producers)
Animals
(all organisms)

16. What is the purpose of photosynthesis
What is the purpose of photosynthesis? What is the purpose of cellular respiration?
Where does photosynthesis occur? Cellular respiration?
Describe what would happen if the amount of sunlight available to a plant became limited. How would that affect cellular respiration?
What are the reactants in each of these equations? What are the products?